Alarm-bell for elevators.



Now 57,368. Q PATENTEDJUNE18J907'.

A. c.s1ssou. I

ALARM BELL FOR ELEVATORS.

APPLICATION FILED DEC. 18. 1905p 3 SHEBTBSHEET 1.

WITNESSES INvBNTuRa gj/fjc I Ehv Q I TV- 110.857.3653. PATENTED MINI-:18, 1907.

1 A. c. sxssow.

ALARM BELL FOR ELEVATORS.

' 1 APPLICATION FILED DE(!.18.1906.r 3' I 2 INVEI'NTEIR'.

'ATTY.

ms NORRIS PETERS cm. wAsnlnarnu. n. c.

Aye. SISSON. ALARM BELL FOR ELEVATORS. APPLICATIOKIILED DE0.18.1906.

PATENTED JUNE 18, 1907.

8 SHEBTS- SHEET 3.

iwm 55 3 d/J i |NVENTE1R.-

AT TY- YERS co. WASHINGYON, n. L

ARTHUR c.- sIssoN, or; P'AwrurI T, RHODE ISLAND.

ALARM-BELL FOR ELEVATORS. if

Specification of Letters Iatent. Application fl ed-13609111136518, i905. Serial No. 292,349.

Patented-Tune 18, 1907.

T or whom it flea/y concern; A Beit'known that I, ARTHUR C. Srsson, citizen of the United States, residingat Pawtucket, in the State of Rhode Island, have invented a new and useful Improvement in Alarm-Bells for Elevators, of which the following is a specification.

My invention consists in .the improved construction and arrangement of an alarm bell forattachment to an elevator car, whereby, when the car is in operation, notice of its approach to the landing will always be given, and liability of. accident be prevented.

' In the accompanying drawings, Figure .1 represents a side view of my improved alarm bell as applied to an elevator car. 3 Fig. 2

represents a section taken on the line 2 2 of Fig. 3'. Fig. 3 represents a section taken on the line 3 3 of Fig. 2. Fig. 4 represents a side view of'the cam wheel. Fig. 5 represents an edge view of the same. Fig. 6 represents a section as in F ig. 2, showing .the shank of the bell hammer in engagement with the cam.

Fig. 7 represents a side view of the cam-hold-- ing disk showing a modification. I Fig. 8 represents an edge view of the same; Fig. 9 represents a section taken on the line 9 9 of Fig. 7.

In the drawing, A represents the cross beam at the'top of the elevator car, B the hoisting rope, (J one of the'roller guides for the upper portion of the car, and D one of the upright guiding tracks for the car. To the bracket E, which is bolted to the cross beam A, ispivoted the forked supporting arm F, the arms a a of which are provided at their outer ends with the open notches bl), which are adapted to receive the ends of the fixed axle G of the loose track wheel H, the upper end of the said supporting arm being actuated toward the track D, by means of the spring 81 Thejouter ends of the axle G are provided with the nuts 0 c, and the said axle is also .provided with the shoulders d d, which are located ateach side of the hub of the said track wheel, and upon the said axle G and against the said shoulders d d, areplaced the cam f holding disks I I, and between the hubs of the said cam-holding disks I I and the forks of the supporting arm F, are placed the bells J J, so that upon screwing up the nuts c,c,'the inward springing of the arms'c c' ofithe supporting arm F, will serve to clamp the bells J J, and the cam-holding disks I I against the shoulders 11 d ofthe axle G; the cam-holding l disks I I being also secured to the axle G by means of the set screws 6 e.

The cams K K are loosely secured to the face of the cam-holding disks I I, by means of the pivot screws ff, the loose movement of stop pins 9 g, which are connected with each other by means of the link h, the said link serving to form a side guide for the loose movement of. the inclosed cam K. The track wheel His preferably provided with the projecting points i i, which, by engagement with the track D, will serve to insure the rotation of the wheel H, when the elevator is being either raised or lowered.

To the opposite sides of the track wheel H,

are pivoted the hammers L L, which serve to when the elevator car is being either raised or lowered, one of the said hammers being pivoted at the point 1, atone side of the axis of the said track Wheel, and the other at the point j at the opposite side of the said axis, where by the desired balance of the wheel H will be preserved. The hammers L L are operated for imparting the blow upon the bells,

by means of the. actuating springs M M, the posts N N v serving as a limiting stop for the striking movement of the hammer. The shankQ ofthe hammer is provided with the inclined surfaces m and n, which are adapted forengagement with thecams K K, upon the movement of the Wheel H in either direction.

When the track wheel H is moving in the direction of the arrow in Fig. 6, the engaged cam K will be carried against the stop pin 9,- until the point 0 of the shank of the hammer hammer will bereleased, and the cam will be thrown backward by the action of the inclined surface n,--to the position shown by the dotted lines, thus leaving the hammer free to strike the bell with the full force of the spring M. I i

A modification of my invention is shown in Figs. -7, 8 and 9, in which a three-pointed cam O is employed, the said cam being loosely held upon the hub g of the disk P, which disk is provided with the stop pins 1' 1',

whereby the movement of the cam in either direction will be properlv limited. And in this case upon the rotation of the track wheel H in either direction, the engaged point of the'cam will upon the release of'the engaged shank of the hammer, be thrown back by the p the said cams being limited by means of the ring the bells to sound the required alarm,

passes the point 10 of the cam, and then the action of the inclined faceof the said shank, so that the hammer will be caused to strike the bell with the full force of the spring.

I claim as my invention 1. In an alarm bell, the combination of the forked supporting arm, the fixed pivot axle, the cam-holding disk secured to the pivot axle, the bell held upon the pivot axle between the cam-holding disk and a fork of the supporting arm, the pivoted cam held upon the cam-holding disk, the track wheel, and the spring-actuated hammer pivoted to the said Wheel.

2. In an alarm bell, the combination ofthe forked supporting arm, the fixed pivot axle, l 5

the cam-holding disks secured to the pivot axle, the bells held upon the pivot axle between the cam-holding disks and a fork of the supporting arm, the pivoted cams held upon the cam-holding disks, the track wheel 20 I loosely heldupon the pivot axle between the amholding disks, and the spring-actuated hammers pivoted to the sides of the said wheel at opposite sides of its axis.

-ARTHUR G. SISSON.

Witnesses:

SOCRATES 'SCHOLFIELD, JOHN S. LYNCH. 

